Clearance space

(Steam engine) the space inclosed in one end of the cylinder, between the valve or valves and the piston, at the beginning of a stroke; waste room. It includes the space caused by the piston's clearance and the space in ports, passageways, etc. Its volume is often expressed as a certain proportion of the volume swept by the piston in a single stroke.

See also: Clearance

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Required floor space is a function of equipment size and recommended clearance space for the tank [U.S General] and heat exchanger [Grundfos].
The larger the unit, the greater the clearance space required around the unit.
It can work on both horizontal and vertical pipes with minimum clearance space, and its compact design makes it easy to carry and store.
Another challenge in the coordination was ensuring that the various stone surfaces matched in terms of height, level and gradient, the ceiling height and clearance space. "This was where coordination was at its most difficult," he stresses.
It is presented multibody mechanisms, which have hinges as well as clearance space. In order to investigate characteristics of dynamics, numerical methods were implemented.
The new facility, which will enter service by January 2015, will quintuple the size of TNT Express' current sorting and customs clearance space in Dammam, allowing for a significant improvement in customs clearance efficiency and speed, said a statement.
ATC Truck covers is renaming its cab high truck cap, the “LED,” to the “Stealth.” The company's larger truck cap with more clearance space, the “1600 Series,” will be renamed the “Survivor.”
REMEMBER TO LEAVE ENOUGH CLEARANCE SPACE IN FRONT OF YOUR SHELVING UNITS TO OPEN YOUR CAR DOORS."
For a blind inside the recess (as per below) remember that you will need a little clearance space either side for it to operate smoothly.